Pianists for Alternatively Sized Keyboards

PASK – Pianists for Alternatively Sized Keyboards – is an international movement committed to achieving change in relation to piano keyboard size. 

Specifically, PASK seeks to convince piano manufacturers to begin producing pianos with narrower keys and to convince managers of concert venues, academics, piano teachers and piano competition organizers that these ergonomically scaled piano keyboards (ESPKs)*  have significant benefits for students and performers. They are also known as 'Stretto pianos'.

More here: http://www.paskpiano.org